Tutorial: mention shared repository management.
[git.git] / rev-list.c
1 #include "cache.h"
2 #include "refs.h"
3 #include "tag.h"
4 #include "commit.h"
5 #include "tree.h"
6 #include "blob.h"
7 #include "epoch.h"
8 #include "diff.h"
9
10 #define SEEN            (1u << 0)
11 #define INTERESTING     (1u << 1)
12 #define COUNTED         (1u << 2)
13 #define SHOWN           (1u << 3)
14 #define TREECHANGE      (1u << 4)
15
16 static const char rev_list_usage[] =
17 "git-rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
18 "  limiting output:\n"
19 "    --max-count=nr\n"
20 "    --max-age=epoch\n"
21 "    --min-age=epoch\n"
22 "    --sparse\n"
23 "    --no-merges\n"
24 "    --all\n"
25 "  ordering output:\n"
26 "    --merge-order [ --show-breaks ]\n"
27 "    --topo-order\n"
28 "  formatting output:\n"
29 "    --parents\n"
30 "    --objects\n"
31 "    --unpacked\n"
32 "    --header | --pretty\n"
33 "  special purpose:\n"
34 "    --bisect"
35 ;
36
37 static int dense = 1;
38 static int unpacked = 0;
39 static int bisect_list = 0;
40 static int tag_objects = 0;
41 static int tree_objects = 0;
42 static int blob_objects = 0;
43 static int verbose_header = 0;
44 static int show_parents = 0;
45 static int hdr_termination = 0;
46 static const char *commit_prefix = "";
47 static unsigned long max_age = -1;
48 static unsigned long min_age = -1;
49 static int max_count = -1;
50 static enum cmit_fmt commit_format = CMIT_FMT_RAW;
51 static int merge_order = 0;
52 static int show_breaks = 0;
53 static int stop_traversal = 0;
54 static int topo_order = 0;
55 static int no_merges = 0;
56 static const char **paths = NULL;
57
58 static void show_commit(struct commit *commit)
59 {
60         commit->object.flags |= SHOWN;
61         if (show_breaks) {
62                 commit_prefix = "| ";
63                 if (commit->object.flags & DISCONTINUITY) {
64                         commit_prefix = "^ ";     
65                 } else if (commit->object.flags & BOUNDARY) {
66                         commit_prefix = "= ";
67                 } 
68         }                       
69         printf("%s%s", commit_prefix, sha1_to_hex(commit->object.sha1));
70         if (show_parents) {
71                 struct commit_list *parents = commit->parents;
72                 while (parents) {
73                         printf(" %s", sha1_to_hex(parents->item->object.sha1));
74                         parents = parents->next;
75                 }
76         }
77         if (commit_format == CMIT_FMT_ONELINE)
78                 putchar(' ');
79         else
80                 putchar('\n');
81
82         if (verbose_header) {
83                 static char pretty_header[16384];
84                 pretty_print_commit(commit_format, commit->buffer, ~0, pretty_header, sizeof(pretty_header));
85                 printf("%s%c", pretty_header, hdr_termination);
86         }
87         fflush(stdout);
88 }
89
90 static int rewrite_one(struct commit **pp)
91 {
92         for (;;) {
93                 struct commit *p = *pp;
94                 if (p->object.flags & (TREECHANGE | UNINTERESTING))
95                         return 0;
96                 if (!p->parents)
97                         return -1;
98                 *pp = p->parents->item;
99         }
100 }
101
102 static void rewrite_parents(struct commit *commit)
103 {
104         struct commit_list **pp = &commit->parents;
105         while (*pp) {
106                 struct commit_list *parent = *pp;
107                 if (rewrite_one(&parent->item) < 0) {
108                         *pp = parent->next;
109                         continue;
110                 }
111                 pp = &parent->next;
112         }
113 }
114
115 static int filter_commit(struct commit * commit)
116 {
117         if (stop_traversal && (commit->object.flags & BOUNDARY))
118                 return STOP;
119         if (commit->object.flags & (UNINTERESTING|SHOWN))
120                 return CONTINUE;
121         if (min_age != -1 && (commit->date > min_age))
122                 return CONTINUE;
123         if (max_age != -1 && (commit->date < max_age)) {
124                 stop_traversal=1;
125                 return CONTINUE;
126         }
127         if (no_merges && (commit->parents && commit->parents->next))
128                 return CONTINUE;
129         if (paths && dense) {
130                 if (!(commit->object.flags & TREECHANGE))
131                         return CONTINUE;
132                 rewrite_parents(commit);
133         }
134         return DO;
135 }
136
137 static int process_commit(struct commit * commit)
138 {
139         int action=filter_commit(commit);
140
141         if (action == STOP) {
142                 return STOP;
143         }
144
145         if (action == CONTINUE) {
146                 return CONTINUE;
147         }
148
149         if (max_count != -1 && !max_count--)
150                 return STOP;
151
152         show_commit(commit);
153
154         return CONTINUE;
155 }
156
157 static struct object_list **add_object(struct object *obj, struct object_list **p, const char *name)
158 {
159         struct object_list *entry = xmalloc(sizeof(*entry));
160         entry->item = obj;
161         entry->next = *p;
162         entry->name = name;
163         *p = entry;
164         return &entry->next;
165 }
166
167 static struct object_list **process_blob(struct blob *blob, struct object_list **p, const char *name)
168 {
169         struct object *obj = &blob->object;
170
171         if (!blob_objects)
172                 return p;
173         if (obj->flags & (UNINTERESTING | SEEN))
174                 return p;
175         obj->flags |= SEEN;
176         return add_object(obj, p, name);
177 }
178
179 static struct object_list **process_tree(struct tree *tree, struct object_list **p, const char *name)
180 {
181         struct object *obj = &tree->object;
182         struct tree_entry_list *entry;
183
184         if (!tree_objects)
185                 return p;
186         if (obj->flags & (UNINTERESTING | SEEN))
187                 return p;
188         if (parse_tree(tree) < 0)
189                 die("bad tree object %s", sha1_to_hex(obj->sha1));
190         obj->flags |= SEEN;
191         p = add_object(obj, p, name);
192         entry = tree->entries;
193         tree->entries = NULL;
194         while (entry) {
195                 struct tree_entry_list *next = entry->next;
196                 if (entry->directory)
197                         p = process_tree(entry->item.tree, p, entry->name);
198                 else
199                         p = process_blob(entry->item.blob, p, entry->name);
200                 free(entry);
201                 entry = next;
202         }
203         return p;
204 }
205
206 static struct object_list *pending_objects = NULL;
207
208 static void show_commit_list(struct commit_list *list)
209 {
210         struct object_list *objects = NULL, **p = &objects, *pending;
211         while (list) {
212                 struct commit *commit = pop_most_recent_commit(&list, SEEN);
213
214                 p = process_tree(commit->tree, p, "");
215                 if (process_commit(commit) == STOP)
216                         break;
217         }
218         for (pending = pending_objects; pending; pending = pending->next) {
219                 struct object *obj = pending->item;
220                 const char *name = pending->name;
221                 if (obj->flags & (UNINTERESTING | SEEN))
222                         continue;
223                 if (obj->type == tag_type) {
224                         obj->flags |= SEEN;
225                         p = add_object(obj, p, name);
226                         continue;
227                 }
228                 if (obj->type == tree_type) {
229                         p = process_tree((struct tree *)obj, p, name);
230                         continue;
231                 }
232                 if (obj->type == blob_type) {
233                         p = process_blob((struct blob *)obj, p, name);
234                         continue;
235                 }
236                 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
237         }
238         while (objects) {
239                 /* An object with name "foo\n0000000000000000000000000000000000000000"
240                  * can be used confuse downstream git-pack-objects very badly.
241                  */
242                 const char *ep = strchr(objects->name, '\n');
243                 if (ep) {
244                         printf("%s %.*s\n", sha1_to_hex(objects->item->sha1),
245                                (int) (ep - objects->name),
246                                objects->name);
247                 }
248                 else
249                         printf("%s %s\n", sha1_to_hex(objects->item->sha1), objects->name);
250                 objects = objects->next;
251         }
252 }
253
254 static void mark_blob_uninteresting(struct blob *blob)
255 {
256         if (!blob_objects)
257                 return;
258         if (blob->object.flags & UNINTERESTING)
259                 return;
260         blob->object.flags |= UNINTERESTING;
261 }
262
263 static void mark_tree_uninteresting(struct tree *tree)
264 {
265         struct object *obj = &tree->object;
266         struct tree_entry_list *entry;
267
268         if (!tree_objects)
269                 return;
270         if (obj->flags & UNINTERESTING)
271                 return;
272         obj->flags |= UNINTERESTING;
273         if (!has_sha1_file(obj->sha1))
274                 return;
275         if (parse_tree(tree) < 0)
276                 die("bad tree %s", sha1_to_hex(obj->sha1));
277         entry = tree->entries;
278         tree->entries = NULL;
279         while (entry) {
280                 struct tree_entry_list *next = entry->next;
281                 if (entry->directory)
282                         mark_tree_uninteresting(entry->item.tree);
283                 else
284                         mark_blob_uninteresting(entry->item.blob);
285                 free(entry);
286                 entry = next;
287         }
288 }
289
290 static void mark_parents_uninteresting(struct commit *commit)
291 {
292         struct commit_list *parents = commit->parents;
293
294         while (parents) {
295                 struct commit *commit = parents->item;
296                 commit->object.flags |= UNINTERESTING;
297
298                 /*
299                  * Normally we haven't parsed the parent
300                  * yet, so we won't have a parent of a parent
301                  * here. However, it may turn out that we've
302                  * reached this commit some other way (where it
303                  * wasn't uninteresting), in which case we need
304                  * to mark its parents recursively too..
305                  */
306                 if (commit->parents)
307                         mark_parents_uninteresting(commit);
308
309                 /*
310                  * A missing commit is ok iff its parent is marked 
311                  * uninteresting.
312                  *
313                  * We just mark such a thing parsed, so that when
314                  * it is popped next time around, we won't be trying
315                  * to parse it and get an error.
316                  */
317                 if (!has_sha1_file(commit->object.sha1))
318                         commit->object.parsed = 1;
319                 parents = parents->next;
320         }
321 }
322
323 static int everybody_uninteresting(struct commit_list *orig)
324 {
325         struct commit_list *list = orig;
326         while (list) {
327                 struct commit *commit = list->item;
328                 list = list->next;
329                 if (commit->object.flags & UNINTERESTING)
330                         continue;
331                 return 0;
332         }
333         return 1;
334 }
335
336 /*
337  * This is a truly stupid algorithm, but it's only
338  * used for bisection, and we just don't care enough.
339  *
340  * We care just barely enough to avoid recursing for
341  * non-merge entries.
342  */
343 static int count_distance(struct commit_list *entry)
344 {
345         int nr = 0;
346
347         while (entry) {
348                 struct commit *commit = entry->item;
349                 struct commit_list *p;
350
351                 if (commit->object.flags & (UNINTERESTING | COUNTED))
352                         break;
353                 if (!paths || (commit->object.flags & TREECHANGE))
354                         nr++;
355                 commit->object.flags |= COUNTED;
356                 p = commit->parents;
357                 entry = p;
358                 if (p) {
359                         p = p->next;
360                         while (p) {
361                                 nr += count_distance(p);
362                                 p = p->next;
363                         }
364                 }
365         }
366
367         return nr;
368 }
369
370 static void clear_distance(struct commit_list *list)
371 {
372         while (list) {
373                 struct commit *commit = list->item;
374                 commit->object.flags &= ~COUNTED;
375                 list = list->next;
376         }
377 }
378
379 static struct commit_list *find_bisection(struct commit_list *list)
380 {
381         int nr, closest;
382         struct commit_list *p, *best;
383
384         nr = 0;
385         p = list;
386         while (p) {
387                 if (!paths || (p->item->object.flags & TREECHANGE))
388                         nr++;
389                 p = p->next;
390         }
391         closest = 0;
392         best = list;
393
394         for (p = list; p; p = p->next) {
395                 int distance;
396
397                 if (paths && !(p->item->object.flags & TREECHANGE))
398                         continue;
399
400                 distance = count_distance(p);
401                 clear_distance(list);
402                 if (nr - distance < distance)
403                         distance = nr - distance;
404                 if (distance > closest) {
405                         best = p;
406                         closest = distance;
407                 }
408         }
409         if (best)
410                 best->next = NULL;
411         return best;
412 }
413
414 static void mark_edges_uninteresting(struct commit_list *list)
415 {
416         for ( ; list; list = list->next) {
417                 struct commit_list *parents = list->item->parents;
418
419                 for ( ; parents; parents = parents->next) {
420                         struct commit *commit = parents->item;
421                         if (commit->object.flags & UNINTERESTING)
422                                 mark_tree_uninteresting(commit->tree);
423                 }
424         }
425 }
426
427 static int is_different = 0;
428
429 static void file_add_remove(struct diff_options *options,
430                     int addremove, unsigned mode,
431                     const unsigned char *sha1,
432                     const char *base, const char *path)
433 {
434         is_different = 1;
435 }
436
437 static void file_change(struct diff_options *options,
438                  unsigned old_mode, unsigned new_mode,
439                  const unsigned char *old_sha1,
440                  const unsigned char *new_sha1,
441                  const char *base, const char *path)
442 {
443         is_different = 1;
444 }
445
446 static struct diff_options diff_opt = {
447         .recursive = 1,
448         .add_remove = file_add_remove,
449         .change = file_change,
450 };
451
452 static int same_tree(struct tree *t1, struct tree *t2)
453 {
454         is_different = 0;
455         if (diff_tree_sha1(t1->object.sha1, t2->object.sha1, "", &diff_opt) < 0)
456                 return 0;
457         return !is_different;
458 }
459
460 static int same_tree_as_empty(struct tree *t1)
461 {
462         int retval;
463         void *tree;
464         struct tree_desc empty, real;
465
466         if (!t1)
467                 return 0;
468
469         tree = read_object_with_reference(t1->object.sha1, "tree", &real.size, NULL);
470         if (!tree)
471                 return 0;
472         real.buf = tree;
473
474         empty.buf = "";
475         empty.size = 0;
476
477         is_different = 0;
478         retval = diff_tree(&empty, &real, "", &diff_opt);
479         free(tree);
480
481         return retval >= 0 && !is_different;
482 }
483
484 static struct commit *try_to_simplify_merge(struct commit *commit, struct commit_list *parent)
485 {
486         if (!commit->tree)
487                 return NULL;
488
489         while (parent) {
490                 struct commit *p = parent->item;
491                 parent = parent->next;
492                 parse_commit(p);
493                 if (!p->tree)
494                         continue;
495                 if (same_tree(commit->tree, p->tree))
496                         return p;
497         }
498         return NULL;
499 }
500
501 static void add_parents_to_list(struct commit *commit, struct commit_list **list)
502 {
503         struct commit_list *parent = commit->parents;
504
505         /*
506          * If the commit is uninteresting, don't try to
507          * prune parents - we want the maximal uninteresting
508          * set.
509          *
510          * Normally we haven't parsed the parent
511          * yet, so we won't have a parent of a parent
512          * here. However, it may turn out that we've
513          * reached this commit some other way (where it
514          * wasn't uninteresting), in which case we need
515          * to mark its parents recursively too..
516          */
517         if (commit->object.flags & UNINTERESTING) {
518                 while (parent) {
519                         struct commit *p = parent->item;
520                         parent = parent->next;
521                         parse_commit(p);
522                         p->object.flags |= UNINTERESTING;
523                         if (p->parents)
524                                 mark_parents_uninteresting(p);
525                         if (p->object.flags & SEEN)
526                                 continue;
527                         p->object.flags |= SEEN;
528                         insert_by_date(p, list);
529                 }
530                 return;
531         }
532
533         /*
534          * Ok, the commit wasn't uninteresting. If it
535          * is a merge, try to find the parent that has
536          * no differences in the path set if one exists.
537          */
538         if (paths && parent && parent->next) {
539                 struct commit *preferred;
540
541                 preferred = try_to_simplify_merge(commit, parent);
542                 if (preferred) {
543                         parent->item = preferred;
544                         parent->next = NULL;
545                 }
546         }
547
548         while (parent) {
549                 struct commit *p = parent->item;
550
551                 parent = parent->next;
552
553                 parse_commit(p);
554                 if (p->object.flags & SEEN)
555                         continue;
556                 p->object.flags |= SEEN;
557                 insert_by_date(p, list);
558         }
559 }
560
561 static void compress_list(struct commit_list *list)
562 {
563         while (list) {
564                 struct commit *commit = list->item;
565                 struct commit_list *parent = commit->parents;
566                 list = list->next;
567
568                 if (!parent) {
569                         if (!same_tree_as_empty(commit->tree))
570                                 commit->object.flags |= TREECHANGE;
571                         continue;
572                 }
573
574                 /*
575                  * Exactly one parent? Check if it leaves the tree
576                  * unchanged
577                  */
578                 if (!parent->next) {
579                         struct tree *t1 = commit->tree;
580                         struct tree *t2 = parent->item->tree;
581                         if (!t1 || !t2 || same_tree(t1, t2))
582                                 continue;
583                 }
584                 commit->object.flags |= TREECHANGE;
585         }
586 }
587
588 static struct commit_list *limit_list(struct commit_list *list)
589 {
590         struct commit_list *newlist = NULL;
591         struct commit_list **p = &newlist;
592         while (list) {
593                 struct commit_list *entry = list;
594                 struct commit *commit = list->item;
595                 struct object *obj = &commit->object;
596
597                 list = list->next;
598                 free(entry);
599
600                 if (max_age != -1 && (commit->date < max_age))
601                         obj->flags |= UNINTERESTING;
602                 if (unpacked && has_sha1_pack(obj->sha1))
603                         obj->flags |= UNINTERESTING;
604                 add_parents_to_list(commit, &list);
605                 if (obj->flags & UNINTERESTING) {
606                         mark_parents_uninteresting(commit);
607                         if (everybody_uninteresting(list))
608                                 break;
609                         continue;
610                 }
611                 if (min_age != -1 && (commit->date > min_age))
612                         continue;
613                 p = &commit_list_insert(commit, p)->next;
614         }
615         if (tree_objects)
616                 mark_edges_uninteresting(newlist);
617         if (paths && dense)
618                 compress_list(newlist);
619         if (bisect_list)
620                 newlist = find_bisection(newlist);
621         return newlist;
622 }
623
624 static void add_pending_object(struct object *obj, const char *name)
625 {
626         add_object(obj, &pending_objects, name);
627 }
628
629 static struct commit *get_commit_reference(const char *name, const unsigned char *sha1, unsigned int flags)
630 {
631         struct object *object;
632
633         object = parse_object(sha1);
634         if (!object)
635                 die("bad object %s", name);
636
637         /*
638          * Tag object? Look what it points to..
639          */
640         while (object->type == tag_type) {
641                 struct tag *tag = (struct tag *) object;
642                 object->flags |= flags;
643                 if (tag_objects && !(object->flags & UNINTERESTING))
644                         add_pending_object(object, tag->tag);
645                 object = parse_object(tag->tagged->sha1);
646                 if (!object)
647                         die("bad object %s", sha1_to_hex(tag->tagged->sha1));
648         }
649
650         /*
651          * Commit object? Just return it, we'll do all the complex
652          * reachability crud.
653          */
654         if (object->type == commit_type) {
655                 struct commit *commit = (struct commit *)object;
656                 object->flags |= flags;
657                 if (parse_commit(commit) < 0)
658                         die("unable to parse commit %s", name);
659                 if (flags & UNINTERESTING)
660                         mark_parents_uninteresting(commit);
661                 return commit;
662         }
663
664         /*
665          * Tree object? Either mark it uniniteresting, or add it
666          * to the list of objects to look at later..
667          */
668         if (object->type == tree_type) {
669                 struct tree *tree = (struct tree *)object;
670                 if (!tree_objects)
671                         return NULL;
672                 if (flags & UNINTERESTING) {
673                         mark_tree_uninteresting(tree);
674                         return NULL;
675                 }
676                 add_pending_object(object, "");
677                 return NULL;
678         }
679
680         /*
681          * Blob object? You know the drill by now..
682          */
683         if (object->type == blob_type) {
684                 struct blob *blob = (struct blob *)object;
685                 if (!blob_objects)
686                         return NULL;
687                 if (flags & UNINTERESTING) {
688                         mark_blob_uninteresting(blob);
689                         return NULL;
690                 }
691                 add_pending_object(object, "");
692                 return NULL;
693         }
694         die("%s is unknown object", name);
695 }
696
697 static void handle_one_commit(struct commit *com, struct commit_list **lst)
698 {
699         if (!com || com->object.flags & SEEN)
700                 return;
701         com->object.flags |= SEEN;
702         commit_list_insert(com, lst);
703 }
704
705 /* for_each_ref() callback does not allow user data -- Yuck. */
706 static struct commit_list **global_lst;
707
708 static int include_one_commit(const char *path, const unsigned char *sha1)
709 {
710         struct commit *com = get_commit_reference(path, sha1, 0);
711         handle_one_commit(com, global_lst);
712         return 0;
713 }
714
715 static void handle_all(struct commit_list **lst)
716 {
717         global_lst = lst;
718         for_each_ref(include_one_commit);
719         global_lst = NULL;
720 }
721
722 int main(int argc, const char **argv)
723 {
724         const char *prefix = setup_git_directory();
725         struct commit_list *list = NULL;
726         int i, limited = 0;
727
728         for (i = 1 ; i < argc; i++) {
729                 int flags;
730                 const char *arg = argv[i];
731                 char *dotdot;
732                 struct commit *commit;
733                 unsigned char sha1[20];
734
735                 if (!strncmp(arg, "--max-count=", 12)) {
736                         max_count = atoi(arg + 12);
737                         continue;
738                 }
739                 if (!strncmp(arg, "--max-age=", 10)) {
740                         max_age = atoi(arg + 10);
741                         limited = 1;
742                         continue;
743                 }
744                 if (!strncmp(arg, "--min-age=", 10)) {
745                         min_age = atoi(arg + 10);
746                         limited = 1;
747                         continue;
748                 }
749                 if (!strcmp(arg, "--header")) {
750                         verbose_header = 1;
751                         continue;
752                 }
753                 if (!strncmp(arg, "--pretty", 8)) {
754                         commit_format = get_commit_format(arg+8);
755                         verbose_header = 1;
756                         hdr_termination = '\n';
757                         if (commit_format == CMIT_FMT_ONELINE)
758                                 commit_prefix = "";
759                         else
760                                 commit_prefix = "commit ";
761                         continue;
762                 }
763                 if (!strncmp(arg, "--no-merges", 11)) {
764                         no_merges = 1;
765                         continue;
766                 }
767                 if (!strcmp(arg, "--parents")) {
768                         show_parents = 1;
769                         continue;
770                 }
771                 if (!strcmp(arg, "--bisect")) {
772                         bisect_list = 1;
773                         continue;
774                 }
775                 if (!strcmp(arg, "--all")) {
776                         handle_all(&list);
777                         continue;
778                 }
779                 if (!strcmp(arg, "--objects")) {
780                         tag_objects = 1;
781                         tree_objects = 1;
782                         blob_objects = 1;
783                         continue;
784                 }
785                 if (!strcmp(arg, "--unpacked")) {
786                         unpacked = 1;
787                         limited = 1;
788                         continue;
789                 }
790                 if (!strcmp(arg, "--merge-order")) {
791                         merge_order = 1;
792                         continue;
793                 }
794                 if (!strcmp(arg, "--show-breaks")) {
795                         show_breaks = 1;
796                         continue;
797                 }
798                 if (!strcmp(arg, "--topo-order")) {
799                         topo_order = 1;
800                         limited = 1;
801                         continue;
802                 }
803                 if (!strcmp(arg, "--dense")) {
804                         dense = 1;
805                         continue;
806                 }
807                 if (!strcmp(arg, "--sparse")) {
808                         dense = 0;
809                         continue;
810                 }
811                 if (!strcmp(arg, "--")) {
812                         i++;
813                         break;
814                 }
815
816                 if (show_breaks && !merge_order)
817                         usage(rev_list_usage);
818
819                 flags = 0;
820                 dotdot = strstr(arg, "..");
821                 if (dotdot) {
822                         unsigned char from_sha1[20];
823                         char *next = dotdot + 2;
824                         *dotdot = 0;
825                         if (!*next)
826                                 next = "HEAD";
827                         if (!get_sha1(arg, from_sha1) && !get_sha1(next, sha1)) {
828                                 struct commit *exclude;
829                                 struct commit *include;
830                                 
831                                 exclude = get_commit_reference(arg, from_sha1, UNINTERESTING);
832                                 include = get_commit_reference(next, sha1, 0);
833                                 if (!exclude || !include)
834                                         die("Invalid revision range %s..%s", arg, next);
835                                 limited = 1;
836                                 handle_one_commit(exclude, &list);
837                                 handle_one_commit(include, &list);
838                                 continue;
839                         }
840                         *dotdot = '.';
841                 }
842                 if (*arg == '^') {
843                         flags = UNINTERESTING;
844                         arg++;
845                         limited = 1;
846                 }
847                 if (get_sha1(arg, sha1) < 0)
848                         break;
849                 commit = get_commit_reference(arg, sha1, flags);
850                 handle_one_commit(commit, &list);
851         }
852
853         if (!list &&
854             (!(tag_objects||tree_objects||blob_objects) && !pending_objects))
855                 usage(rev_list_usage);
856
857         paths = get_pathspec(prefix, argv + i);
858         if (paths) {
859                 limited = 1;
860                 diff_tree_setup_paths(paths);
861         }
862
863         save_commit_buffer = verbose_header;
864         track_object_refs = 0;
865
866         if (!merge_order) {             
867                 sort_by_date(&list);
868                 if (list && !limited && max_count == 1 &&
869                     !tag_objects && !tree_objects && !blob_objects) {
870                         show_commit(list->item);
871                         return 0;
872                 }
873                 if (limited)
874                         list = limit_list(list);
875                 if (topo_order)
876                         sort_in_topological_order(&list);
877                 show_commit_list(list);
878         } else {
879 #ifndef NO_OPENSSL
880                 if (sort_list_in_merge_order(list, &process_commit)) {
881                         die("merge order sort failed\n");
882                 }
883 #else
884                 die("merge order sort unsupported, OpenSSL not linked");
885 #endif
886         }
887
888         return 0;
889 }